How much colder would it be?
Science displays at Wisconsin State Parks will tell you that glaciers covered our landscape, ending just 12,000 years ago.
This means that ice, up to a MILE-THICK, covered this state, and carved out features like the Kettle Moraine. A six-inch snowfall like we get now and then in winter is not what caused these earth changes.
More glacial maps from UW-Green Bay.
Question: What did the Indians do back then to cause the ice to melt away? Or did they just happen to be the first settlers after the ice melted away? Melted then, by what?